Improvement in chimney-caps



J. TOMLINSO N..

Chimney Cap.

Patented Sept. 8, 1863 N, PETERS. Pholo-Lillynsmphor. Washingtom n. c.

UNITED STATES PATENT OFFICE.

JAMES TOMLINSON, OF RAGINE, VVISGONSIN.

EMPROVEMENT IN CHIMNEY-CAPS.

To (ZZZ whom it may concern:

Be it known that 1, JAMES TOMLINSON, of Racine, in the county of Racine and State of Wisconsin, have invented a new and useful improvement in Smoke-Jacks and Ventilators; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accom pan ying drawings, making a part of this specification, in which- Figure 1 is a vertical central section of my. invention, taken in the line a; av, Fig. 2; Fig. 21 a section of the same, taken in the line 31y, Fig. 1.

Similar letters of reference indicate corresponding parts in the two figures.

This invention consists in providing the smoke-jack or ventilator with a series of scoopshaped wings or funnels arranged around the upper end ot the smoke or ventilating tube,

of the smoke-jack or ventilator, said tube being of conical form, and attached to the upper end of the chimney when the device is used as a smokejack, or inserted in the root of the building or structure when the device is used as a ventilator.

To the upper part of the tube A there is attached a conical plate, B, on which a series of scoop-shaped wings or funnels, (J, are attached in a position tangentially with the upper end of the tube A, as shown clearly in Fig. 2.

These wings or funnels O, in consequence of the plate B being conical, have an inclined position, as shown in Fig. l, and to the upper parts of said wings or funnels a conical plate, D, is attached, having at its center or apex a vertical tube, E, which is in line with but rather greater in diameter than the'tube A, as shown in Fig. l. The lower end of the tube E is a short'distance above the top of the tube A, and the upper parts ofthe inner ends of the wings 0 project above the top of the tube A. On the top of the tube E a conical cap, F, is attached.

From the above description it will be seen that the air that enters into the smoke-jack laterally will have an upward spiral motion given it by the wings or funnels (l, and. this upward spiral movement of the air through the tube E above A increases the draft of the latter, and thereby renders the device very efficient and perfect in its operation. The wind also, if blowing or moving in opposite or conflicting currents around the smoke-jack or ventilator. will not affect its operation in the least, as all the wind or air that enters in any direction or at any side'of the device will have the same spiral motion communicated to it.

The device may be constructed of the usual material-sheet metaland properly galvanized or painted to prevent oxidation.

Having thus described myinvention, What I claim as new, and desire to secure by Letters Patent, isi The scooped-shaped wings or funnels O, in connection with the conical plates B D and tubes A E, all arranged substantially as and for the purpose herein set forth.

JAMES TOMLINSON.

Witnesses S. W. SPASARD, D. MCDONALD. 

